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The Lincoln Classic 1 & 3
The Classic series of welders was supposed to be the successors to the SA-200, SA-250-3.152, and the SA250-F163. The Classic 1 used the Continental TM-27. The Classic 3 the Continential TMD-27 diesel. The Classic 2 used the Deutz F3`1000.
What no one will tell you about the Octagon barrel SA200. Basically, the SA200, SA250, 3.152, Classic series, and 300 series diesels have almost identical designs. There are different armature lengths and bearings: different shunt coils, and other differences. With one design, a whole new line of machines was created, featuring more powerful engines, more torque, and higher current output. The commonality of the basic welder/AC exciter made it a profitable design.
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Except for engines, engine and idle controls, the machines are almost identical. Keep this in mind when you are sourcing parts and service,
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THE Lincoln Classic 1 TM-27
All the pipeline welders and the other welders who were smart enough to understand the original SA200 and SA250-F163 were dependable, maintainable machines. Simple, mature technology and an engine that originated in the late 1920s, which was a standard engine found in welders, cranes, forklifts, pavers, pumps, cars, tractors, watercraft, and anywhere a simple industrial engine was needed. The orginal DC welder was designed ariound an engine that would provide 18 HP at 1500 RPMs. It worked adn still does today.
Why kill the flat-head or "L" head engine design? In the early 70's, the EPA began a program to remove lead from fuel. Good, it's toxic, get it out of the air. The BS I read online says flat-head engines need to be lubricated to keep the valve guides and valve seats. (Nothing about Octane levels!) In approximately 1995, carburetored engines would not pass new emission standards. Goodbye!
Continental's answer was the TM (totally metric) family of engines. Two, three, and four-cylinder engines. The four-cylinder was also available in a diesel version, the TMD-27. I don't know the whole story, but the word on the street tells a dark tale. The TM series shared pistons, rods, valves, and, I think, water pumps. They had an entire division dedicated to making these engines for the military. Both Lincoln and Miller tried them, with so-so results. From what I understand, the big problem was leaking rear main seals. I know it was a manufacturing defect in the plastic or rubber molding process. It seems to have soured everybody on the engine.
Here is what you need to know. To the best of my knowledge, Continental is not supporting the engine; in fact, I am sure if they are still in business. The parts available are old stock, used, and or refurbished.
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1. Water pumps can be rebuilt.
2. Governors are almost impossible to find. Obama killed the company that manufactured Pierce Governors; they are gone.
3. The distributor and parts are available from Pertronics.
4. It came with a very good Zenith carburetor (CA10F00361). FYI: Zenith closed its
doors 12/31/2025.
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5. Lincoln has walked away from this machine.
The Classics 1, 2, and 3 all used the L6061exciter frame, obsolete from Lincoln.
Weldmart Rewound Exciter Brackets
2-year warranty.
TM-27 ENGINE
The Lincoln Classic 3 TMD-27 (Diesel)
The Lincoln Classic 3, sometimes called Classic 3D. The diesel engine was the Continental.
TMD-27. The original engine block, pistons, and camshaft were identical. They quickly found that the cast-iron gasoline crankshaft would break, so a steel shaft was installed in its place.
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They had the same problem with a defective rear main seal; they took too long to fix the problem, and it soured the customers.
What you need to know about the TMD-27 Engine
From everything I have experienced, heard, and more or less figured out myself, it is a machine you want to understand if you are considering purchasing.
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1. Parts, both internal and external, are all going away.
2. There are little or no of the following: fuel injectors, injector lines, original fuel filter bases, manifolds, water pump pulleys (they are smaller in diameter than gasoline pumps), original cooling hoses.
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On the positive side, the welder end is identical to most of the octagon barrel Lincoln machines
You will have to use the donor machines, flywheel, adapter plate, and starter. The rest is pretty straignt forward. I have seen these maachines in junk yards. Look around,